Note: the terms “roll”, “check” and “throw” can be used almost interchangeably anywhere.

The most used dice in both D&D and this role play system is the twenty-sided die, also known as a d20. There are several types of rolls that you will be making, each distinguished by the type of number you will be adding to your roll as the modifier. To learn more about the modifiers, check out the Attributes and Modifiers page.

​All of these types of rolls have a certain threshold that determines whether the roll is successful, or a failure. When you attack a creature, the treshold is referred to as Armor Class (AC) which is determined by the type and armor of the creature (for more information, check out the Armor and Shields page). For other actions, it is called Difficulty Class (DC) which is determined by how hard or easy it is to complete. Some abilities and most spells have per-determined DC, which can be found in their descriptions (for spells this is labeled as their Spell DC), in other cases the DC is made up “on the fly”. When you make any of these rolls, roll a d20 and add any acceptable modifiers (both positive and negative).

​Many other rolls (usually damage) also require you to roll dice, but those are usually not a d20. Instead, the type and number of dice rolled is noted in a XdY format, where X=number of dice and Y=type of dice. For example, 3d6 would be three six-sided dice, 5d10 would be five ten-sided dice, 1d8 would be a singe eight-sided die. The combinations are endless. A somewhat special type of roll is the percentile roll – essentially a single d100 roll.

When talking about what you rolled, the term “nat” is used for saying what number you rolled on your d20 roll, without any applied modifiers. To use it, just simply put the number on the dice behind the word. And done. This term is especially important for nat 20s and nat 1s, which are known as criticals, detailed below.